Question

Identify the GCF of 10x4y3 − 5x3y2 + 20x2y.

Answer 1

Look at numbers first. The largest common factor of 10, 5 and 20 is 5.
Now look at x, the largest common factor of x^4, x^3 and x is x
The largest common factor of y^3, y^2 and y is y
Now multiply all largest common factors together